Combine remaining 1/2 cup nuts with the 1 tablespoon sugar (if using nuts). Divide the dough into 4 equal parts. Work with one part at a time, leaving the rest in the refrigerator. Divide each part into 12 pieces. Quickly press each piece of dough around a chocolate-covered caramel (Rolo). Roll into ball. Dip one side into sugar. (Additional sugar may be needed for dipping if nuts are omitted.)